CN1147445A - Method of removing volatile matters from vent arrangement - Google Patents
Method of removing volatile matters from vent arrangement Download PDFInfo
- Publication number
- CN1147445A CN1147445A CN96110365A CN96110365A CN1147445A CN 1147445 A CN1147445 A CN 1147445A CN 96110365 A CN96110365 A CN 96110365A CN 96110365 A CN96110365 A CN 96110365A CN 1147445 A CN1147445 A CN 1147445A
- Authority
- CN
- China
- Prior art keywords
- volatile materials
- exhaust apparatus
- filtering material
- mold
- wanting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/06—Conditioning or physical treatment of the material to be shaped by drying
- B29B13/065—Conditioning or physical treatment of the material to be shaped by drying of powder or pellets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/58—Details
- B29C45/63—Venting or degassing means
Abstract
In a vent arrangement comprising a heating cylinder 1 containing therein a screw and provided with a vent hole 3 and a reduced pressure exhaust path 4 provided with a vacuum pump and connected to the vent hole for draining volatile fractions of a material to be molded from the heating cylinder by reducing the pressure in the vent hole by means of the vacuum pump, said volatile fractions are removed by arranging in the exhaust path a filter unit 7 filled with a granular filtering material 8. The material to be molded is used for the filtering material 8. According to the above construction, it can be achieved to efficiently remove volatile matters by using the molded material as the filtering material of the filter unit arranged in the reduced pressure exhaust path of a vent arrangement.
Description
The present invention relates to a kind of method of removing volatile materials, this volatile materials is to produce during as material that will mold in the moulding machine of exhaust apparatus is housed with noncrystalline attitude or non-dry state when crystalline resins such as PETG.
PETG or PET particle are generally amorphous or transparent.In addition, the PET particle that water content is lower than equilibrium valve is moisture absorption, if melt when containing such water content, and then may hydrolysis and become can not mold.
When noncrystalline PET particle was heated to above the vitrification point (Tg) of PET, they are deliquescing and sticking slightly then.The PET particle of viscosity is difficult for being pressed in the screw rod of moulding machine, and can cause that particle can not correctly enter the fault of machine.On the contrary, not deliquescing does not become sticky the PET particle of crystallization yet under the temperature of Tg being higher than.
Given this, the supplier of PET particle before it is put goods on the market, typically make noncrystalline PET particle under 150-160 ℃ temperature dry or at high temperature solid phase so that its drying and crystallization.Therefore, the PET particle that is purchased is more expensive than amorphous PET particle.As buy amorphous PET particle, must make its drying and crystallization before using the mold operator of this PET particle to use.
On the other hand, whether be moisture absorption with the PET particle product that mold obtains as raw material regardless of its crystallization.Therefore, usually, owing to the storage requirement of moisture absorption degree with particle changes, so before the mold that the PET particle is predrying.
Predryingly operate in 150 ℃ and hold and continue about 4 hours.In addition, typically big drier is installed in the conventional injector, when time per unit consumes with the speed that increases in the cycle than long mold, guarantees that raw material without interruption is to improve the efficient of mold operation with convenient raw material.Inevitably, the powder wear rate of this big drier is very high.Then the preparation in mold cycle also is consuming time, if this big drier irregular working will seriously influence the efficient of whole mold operation.
In view of above situation, come into vogue gradually with the discharge type injector as not needing pre-dried injection mold device.Though utilizing has the injector casting resin of exhaust feature to be known technology, seldom have to be suitable for the injection moulding PETG, because forming, acetaldehyde of discharging from steam vent as volatile fraction and oligomer need the problem that solves.
Condensation, absorption, dissolving and decomposition are the known technologies that is used to remove volatile fraction; but in them each all need use special setting, with respect to the very big and expensive device of corresponding moulding machine, therefore the feasible device of removing volatile materials from exhaust apparatus seldom is provided.Any desire reduces this device size so that it adapts to the attempt of corresponding exhaust apparatus, all is attended by volatile materials and removes inefficient problem.
In view of above-mentioned leftover problem, the objective of the invention is to provide a kind of new do not waste filtering material remove the just method of contained volatile materials from the gas that exhaust apparatus is discharged in mode simple, efficient and cost-effective.
According to the present invention, above-mentioned purpose realizes by following method is provided: a kind of method of removing volatile materials in the exhaust apparatus, this exhaust apparatus comprises and wherein contains screw rod and be provided with the cartridge heater of steam vent and the decompression exhaust path of being furnished with vavuum pump and linking to each other with steam vent, this exhaust channel is used for discharging the volatile fraction of wanting the mold material by the pressure that utilizes vavuum pump to reduce steam vent from cartridge heater, be characterised in that by loading the described mold material of wanting to be installed in the exhaust channel, remove volatile fraction as the filter of particle filtering material.
Be used for purposes of the present invention, preferably condenser is installed in the decompression exhaust path between the steam vent and filter, so that the volatile materials condensation that is discharged from and tentatively removing, afterwards by with wanting the mold material to remove volatile materials as the filter of filtering material.
Though the present invention because its use is limited to any specific mold material of wanting, does not preferably use PETG, PEN (polyethylene naphthalate) or its mixture.
Fig. 1 is the schematic diagram of the suitable exhaust apparatus of the inventive method.
With reference to the accompanying drawings, the cartridge heater 1 that conventional structure, inside are equipped with the discharge type injector of the injection screw 2 that can move forward and backward is shown.Though it is not shown; in the general structure of this kind discharge type injector, this injection screw 2 comprises front screw part and back screw portion, and each includes feed zone and compressional zone; wherein the diameter of compressional zone is bigger than all the other districts, and steam vent 3 drills the sidewall of the cartridge heater in the front screw part rear portion.
Described condenser 5 is for being arranged with a series of demarcation strip 5b alternately to limit the path 5c that sucks discharge gas wherein along the chuck sidewall in hull shape chuck 5a.The contained volatile materials that comprises moisture content is flow through refrigerant (cold water) condensation of chuck 5a and is discharged by scavenge port 5d from the discharge gas that steam vent 3 sucks the chuck.
Filter for installation 7 comprises the cylinder type main body 7a of band bottom and is used for sealing airtightly the lid 7c that easily moves of this main body, body interior is separated plate 7b and is divided into left and right region, as shown in the figure, described lid 7c is provided with import and exports and corresponds respectively to the left and right region of being divided by demarcation strip 7b.Main body 7a is equipped with filtering material 8, and it is identical with the material of wanting mold.If the material of mold is a PETG, then main body 7a also is equipped with PETG.If the material of mold is a PEN, then main body also is equipped with PEN.In the present invention, because filtering material is identical with the material of wanting mold, if the material of mold is an amorphous substance, then filtering material preferably also is an amorphous substance.But, can use noncrystalline, crystallization, dry or filtering material dry or its mixture state certainly.
Then, flow through decompression exhaust path 4 and gone into the gap of filter 7 by the discharge aspiration of condenser 5, further flow to vavuum pump P by the particle of filling as filtering material 8.When discharging the gap of gas by particle, discharge volatile materials contained in the gas such as acetaldehyde and oligomer and absorbed by particle and remove.
From the discharge gas that the exhaust apparatus of structure is as mentioned above arranged, removing in the experiment of volatile materials, using without pre-dried noncrystalline PETG, obtaining following value as wanting the mold material.Admission space: 10 lift operations times: added weight in 10 hours: 4 restrain
But washing and filtering material 8 after the drying, can be used as the material in back mold stage easily to remove the material that is absorbed after experiment finished in surrounding air.As mentioned above,, compare, can reduce the cost of removing volatile fraction with the situation of using different filtering materials owing to want the mold material as the filtering material of removing contained volatile materials in the discharge gas that comes from steam vent.
In addition, contained volatile materials is to emit the mold material from want identical with filtering material in the gas because decompression is discharged, and they can be absorbed by this filtering material efficiently.Also have,, discharge gas and can freely pass through it, can prevent to descend, thereby filter can have long service life because of any absorption efficiency that blocking filter causes because the particle of wanting the mold material that is purchased has structure and the size that is suitable for producing the gap.
At last, because part wants the mold material as filtering material, the discharge type moulding machine can constantly use fresh filtering material operation, is used for behind the filter described filtering material and can washs and be used as and want the mold material, eliminates the waste of any raw material.
Claims (6)
1. method of removing volatile materials in the exhaust apparatus, described exhaust apparatus comprises and wherein contains screw rod and be provided with the cartridge heater of steam vent and the decompression exhaust path of being furnished with vavuum pump and linking to each other with steam vent, be used for from cartridge heater, discharging the volatile fraction of wanting the mold material by the pressure that utilizes vavuum pump to reduce steam vent, described method is characterised in that by being filled with the described mold material of wanting and is installed in the exhaust channel as the filter of particle filtering material, removes volatile fraction.
2. according to the method for removing volatile materials in the exhaust apparatus of claim 1, wherein condenser is arranged in the decompression exhaust path between the steam vent and filter, so that the volatile materials condensation of discharging and tentatively removing.
3. according to the method for removing volatile materials in the exhaust apparatus of claim 1 or 2, wherein want the mold material identical, be selected from PETG, PEN (polyethylene naphthalate) and composition thereof with filtering material.
4. according to the method for removing volatile materials in the exhaust apparatus of claim 1 or 2, wherein wanting mold material and filtering material is PETG.
5. according to the method for removing volatile materials in the exhaust apparatus of claim 1 or 2, wherein wanting mold material and filtering material is PEN.
6. according to the method for removing volatile materials in the exhaust apparatus of claim 1 or 2, wherein wanting mold material and filtering material is the mixture of PETG and PEN.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16933295A JP3700203B2 (en) | 1995-06-13 | 1995-06-13 | Method for removing volatile matter in venting device |
| JP169332/95 | 1995-06-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1147445A true CN1147445A (en) | 1997-04-16 |
Family
ID=15884596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96110365A Pending CN1147445A (en) | 1995-06-13 | 1996-06-13 | Method of removing volatile matters from vent arrangement |
Country Status (14)
| Country | Link |
|---|---|
| US (1) | US5759238A (en) |
| EP (1) | EP0748674A3 (en) |
| JP (1) | JP3700203B2 (en) |
| KR (1) | KR970000501A (en) |
| CN (1) | CN1147445A (en) |
| AR (1) | AR002448A1 (en) |
| BR (1) | BR9601821A (en) |
| CA (1) | CA2178896A1 (en) |
| EG (1) | EG20641A (en) |
| IL (1) | IL118641A (en) |
| NZ (1) | NZ286794A (en) |
| SG (1) | SG93795A1 (en) |
| TW (1) | TW300865B (en) |
| ZA (1) | ZA965027B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW577902B (en) * | 1998-01-27 | 2004-03-01 | Teijin Ltd | Method for producing aromatic polyester preform |
| JP2007069355A (en) * | 2005-09-02 | 2007-03-22 | Toyota Motor Corp | Mold |
| JP4414408B2 (en) * | 2006-03-28 | 2010-02-10 | 株式会社日本製鋼所 | Screw-type extruder devolatilization simulation device and screw-type extruder devolatilization simulation program |
| DE102007056610B4 (en) * | 2007-11-23 | 2012-10-25 | Baratti Engineering Gmbh | Method for extruding plastic parts |
| DE102013000316A1 (en) | 2013-01-10 | 2014-07-10 | Brückner Maschinenbau GmbH & Co. KG | Device for degassing polymer melts |
| CN103895181B (en) * | 2014-04-11 | 2015-12-02 | 昆山市大久电子有限公司 | Gas recoverable injection mold |
| ES2860944T3 (en) | 2014-10-30 | 2021-10-05 | EcoGensus LLC | Procedure for forming a solid fuel composition from mixed solid waste |
| JP6712276B2 (en) | 2014-10-30 | 2020-06-17 | エコジェンサス エルエルシーＥｃｏｇｅｎｓｕｓ，Ｌｌｃ | Solid fuel composition formed from mixed solid waste |
| TWI695882B (en) * | 2014-10-30 | 2020-06-11 | 美商艾科詹瑟斯有限公司 | System for forming a solid fuel composition from mixed solid waste |
| CN104984556B (en) * | 2015-07-15 | 2016-09-07 | 启仲化工（广西）有限公司 | For removing the device of low volatile in macromolecular compound |
| CN104971510B (en) * | 2015-07-15 | 2017-01-11 | 启仲化工（广西）有限公司 | Device for removing low volatile matter from macromolecular compound |
| US10618025B2 (en) | 2018-04-04 | 2020-04-14 | EcoGensus LLC | Process vessel for forming fuel compositions and related systems and methods |
| JP7229065B2 (en) * | 2019-03-27 | 2023-02-27 | 住友重機械工業株式会社 | Injection molding machine |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5243770A (en) * | 1975-10-04 | 1977-04-06 | Nitsukuu Kogyo Kk | Method of treating high temperature exhaust gas containing tar mist, e tc. |
| US4636085A (en) * | 1982-03-16 | 1987-01-13 | Mapro Inc. | Apparatus for removing volatiles from plastic materials delivered to an extrusion or injection molding machine |
| DE3310676A1 (en) * | 1983-03-24 | 1984-09-27 | Basf Ag, 6700 Ludwigshafen | METHOD AND DEVICE FOR REMOVING VOLATILE CONTENTS FROM POLYMER MELT OR PASTE |
| US4591467A (en) * | 1983-07-22 | 1986-05-27 | Mapro Inc. | Method for removing moisture and volatiles from molding particulate plastic material feed |
| JPS6341107A (en) * | 1986-08-06 | 1988-02-22 | Shisuko:Kk | Resin drying device in plastic molding machine |
| JP2548659B2 (en) * | 1992-03-16 | 1996-10-30 | 日精樹脂工業株式会社 | Bent type injection molding machine |
| AU666435B2 (en) * | 1993-04-30 | 1996-02-08 | A. K. Technical Laboratory, Inc. | Method for injection molding polyethylene terephthalate |
| US5283021A (en) * | 1993-06-14 | 1994-02-01 | Chi Mei Corporation | Process for removing the solvent from an elastomeric polymer solution |
| DE4429708C2 (en) * | 1993-08-24 | 2001-04-19 | Nissei Plastics Ind Co | Spraying process for polyethylene terephthalate |
-
1995
- 1995-06-13 JP JP16933295A patent/JP3700203B2/en not_active Expired - Lifetime
-
1996
- 1996-06-11 EP EP96109301A patent/EP0748674A3/en not_active Withdrawn
- 1996-06-11 SG SG9610037A patent/SG93795A1/en unknown
- 1996-06-11 NZ NZ286794A patent/NZ286794A/en unknown
- 1996-06-12 EG EG53896A patent/EG20641A/en active
- 1996-06-12 CA CA002178896A patent/CA2178896A1/en not_active Abandoned
- 1996-06-12 IL IL11864196A patent/IL118641A/en not_active IP Right Cessation
- 1996-06-12 TW TW085107038A patent/TW300865B/zh active
- 1996-06-12 BR BR9601821A patent/BR9601821A/en not_active Application Discontinuation
- 1996-06-13 KR KR1019960021120A patent/KR970000501A/en not_active Application Discontinuation
- 1996-06-13 US US08/663,356 patent/US5759238A/en not_active Expired - Fee Related
- 1996-06-13 ZA ZA965027A patent/ZA965027B/en unknown
- 1996-06-13 AR ARP960103132A patent/AR002448A1/en unknown
- 1996-06-13 CN CN96110365A patent/CN1147445A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP0748674A3 (en) | 1999-09-08 |
| TW300865B (en) | 1997-03-21 |
| JP3700203B2 (en) | 2005-09-28 |
| EG20641A (en) | 1999-10-31 |
| MX9602308A (en) | 1997-10-31 |
| JPH08336834A (en) | 1996-12-24 |
| SG93795A1 (en) | 2003-01-21 |
| IL118641A0 (en) | 1996-10-16 |
| AU5591996A (en) | 1997-01-02 |
| KR970000501A (en) | 1997-01-21 |
| NZ286794A (en) | 1997-07-27 |
| US5759238A (en) | 1998-06-02 |
| AU696145B2 (en) | 1998-09-03 |
| BR9601821A (en) | 1998-01-13 |
| AR002448A1 (en) | 1998-03-11 |
| CA2178896A1 (en) | 1996-12-14 |
| IL118641A (en) | 1999-06-20 |
| ZA965027B (en) | 1997-01-23 |
| EP0748674A2 (en) | 1996-12-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| AD01 | Patent right deemed abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |